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作 者 ：李相敢

期 刊 ：植物生态学报 1987年 11卷 1期 页码：21-31

关键词：麻栎林；种群；生物最；

Keywords:Oak forest, Population, Biomass,

摘 要 ：用点四分法抽测崂山麻栎(Quercus acutissima)林，将获得的150个样点资料建立在通过群落郁闭度系数所反映的光照强度、土壤相对持水量、土壤肥力得分及碱解氮含量的四维空间上，构造了麻栎幼苗，灌木层，草本层及其优势种生物量预测方程；提出度量植物种群对资源选择性系数的新公式，并证明了它的实用性。本文详细探讨了林下优势种的选择性系数、生态位宽度和生态位重叠；指出影响麻栎幼苗生长及栎林群落生产量的限制因子；阐述了种类多样性和均匀度与环境间的关系。

Abstract:

The Sawtooth oak (Quercus acutissima)forest community was measured by quarter point and quadrat methods. New patchness index has been suggested:

Mathematical express of L index is the covariance of the probability of plant population density disposing in i resource axis’ j resource state and theoretical probability in i axis’ j state when the population is regularly disposed, (j=l,2,…’n; n=number of resource states). Dominant species in the shrub layer and herb layer were put in four axes–light level (k axis), relative soil water content (Rw axis), soil fertility score (F axis) and soil nitrogen content (N axis) and studied. Each species’ patchness index, niche breadth, niche overlap with other species have been analysed in the four axes. Shannon-Wiener diversity index (D) increases with the increase in abundance of resource, H’ (Homogeneity) decreases with the increase in abundance of resource, their regression equation:

D=0.4040–0.0211 R+0.0248 F H’=1.112–0.1400 Ln Rw+0.00064N Biomass (W) regression equation:

Herb layer: W= –12.30+4.07OLnRw

Shrub layer: W= –16.70–0.0735k+2.080Rw–0.4400F

Quercus acutissima’ seedling: W= –35.25+20.88LnN

or W= 2.476 – 0.0371Rw

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